/brz/remove-bazaar

# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Push implementation that simply prints message saying push is not supported."""

from dulwich.client import (

    SimpleFetchGraphWalker,

    )

from dulwich.repo import (

    MissingObjectFinder,

    )

from bzrlib import (

    ui,

    )

from bzrlib.repository import (

    InterRepository,

    )

from bzrlib.revision import (

    NULL_REVISION,

    )

from bzrlib.plugins.git.converter import (

    BazaarObjectStore,

    )

from bzrlib.plugins.git.errors import (

    NoPushSupport,

    )

from bzrlib.plugins.git.repository import (

    GitRepository,

    LocalGitRepository,

    GitRepositoryFormat,

    )

from bzrlib.plugins.git.remote import (

    RemoteGitRepository,

    )

class MissingObjectsIterator(object):

    """Iterate over git objects that are missing from a target repository.

    """

    def __init__(self, source, mapping, pb=None):

        """Create a new missing objects iterator.

        """

        self.source = source

        self._object_store = BazaarObjectStore(self.source, mapping)

        self._revids = set()

        self._sent_shas = set()

        self._pending = []

        self.pb = pb

    def import_revisions(self, revids):

        self._revids.update(revids)

        for i, revid in enumerate(revids):

            if self.pb:

                self.pb.update("pushing revisions", i, len(revids))

            git_commit = self.import_revision(revid)

            yield (revid, git_commit)

    def need_sha(self, sha):

        if sha in self._sent_shas:

            return False

        (type, (fileid, revid)) = self._object_store._idmap.lookup_git_sha(sha)

        assert type in ("blob", "tree")

        if revid in self._revids:

            # Not sent yet, and part of the set of revisions to send

            return True

        # Not changed in the revisions to send, so either not necessary

        # or already present remotely (as git doesn't do ghosts)

        return False

    def queue(self, sha, obj, path, ie=None, inv=None):

        if obj is None:

            obj = (ie, inv)

        self._pending.append((obj, path))

        self._sent_shas.add(sha)

    def import_revision(self, revid):

        """Import the gist of a revision into this Git repository.

        """

        inv = self.source.get_inventory(revid)

        todo = [inv.root]

        tree_sha = None

        while todo:

            ie = todo.pop()

            (sha, object) = self._object_store._get_ie_object_or_sha1(ie, inv)

            if ie.parent_id is None:

                tree_sha = sha

            if not self.need_sha(sha):

                continue

            self.queue(sha, object, inv.id2path(ie.file_id), ie, inv)

            if ie.kind == "directory":

                todo.extend(ie.children.values())

        assert tree_sha is not None

        commit = self._object_store._get_commit(revid, tree_sha)

        self.queue(commit.id, commit, None)

        return commit.id

    def __len__(self):

        return len(self._pending)

    def __iter__(self):

        for i, (object, path) in enumerate(self._pending):

            if self.pb:

                self.pb.update("writing pack objects", i, len(self))

            if isinstance(object, tuple):

                object = self._object_store._get_ie_object(*object)

            yield (object, path)   

class InterToGitRepository(InterRepository):

    """InterRepository that copies into a Git repository."""

    _matching_repo_format = GitRepositoryFormat()

    def __init__(self, source, target):

        super(InterToGitRepository, self).__init__(source, target)

        self.mapping = self.target.get_mapping()

    @staticmethod

    def _get_repo_format_to_test():

        return None

    def copy_content(self, revision_id=None, pb=None):

        """See InterRepository.copy_content."""

        self.fetch(revision_id, pb, find_ghosts=False)

    def fetch(self, revision_id=None, pb=None, find_ghosts=False, 

            fetch_spec=None):

        raise NoPushSupport()

class InterToLocalGitRepository(InterToGitRepository):

    def missing_revisions(self, stop_revision):

        if stop_revision is None:

            raise NotImplementedError

        missing = []

        pb = ui.ui_factory.nested_progress_bar()

        try:

            graph = self.source.get_graph()

            for revid, _ in graph.iter_ancestry([stop_revision]):

                pb.update("determining revisions to fetch", len(missing))

                if not self.target.has_revision(revid):

                    missing.append(revid)

            return graph.iter_topo_order(missing)

        finally:

            pb.finished()

    def dfetch_refs(self, refs):

        revidmap = {}

        new_refs = {}

        for name, revid in refs.iteritems():

            newrevidmap, newgitidmap = self.dfetch(revid)

            revidmap.update(newrevidmap)

            if revid in newgitidmap:

                gitid = newgitidmap[revid]

            else:

                gitid, _ = self.mapping.revision_id_bzr_to_foreign(revid)

            self.target._git.set_ref(name, gitid)

            new_refs[name] = gitid

        return revidmap, new_refs

    def dfetch(self, stop_revision=None):

        """Import the gist of the ancestry of a particular revision."""

        gitidmap = {}

        revidmap = {}

        self.source.lock_read()

        try:

            todo = [revid for revid in self.missing_revisions(stop_revision) if revid != NULL_REVISION]

            pb = ui.ui_factory.nested_progress_bar()

            try:

                object_generator = MissingObjectsIterator(self.source, self.mapping, pb)

                for old_bzr_revid, git_commit in object_generator.import_revisions(

                    todo):

                    new_bzr_revid = self.mapping.revision_id_foreign_to_bzr(git_commit)

                    revidmap[old_bzr_revid] = new_bzr_revid

                    gitidmap[old_bzr_revid] = git_commit

                self.target._git.object_store.add_objects(object_generator) 

            finally:

                pb.finished()

        finally:

            self.source.unlock()

        return revidmap, gitidmap

    @staticmethod

    def is_compatible(source, target):

        """Be compatible with GitRepository."""

        return (not isinstance(source, GitRepository) and 

                isinstance(target, LocalGitRepository))

class InterToRemoteGitRepository(InterToGitRepository):

    def dfetch_refs(self, new_refs):

        """Import the gist of the ancestry of a particular revision."""

        revidmap = {}

        def get_changed_refs(refs):

            ret = {}

            for name, revid in new_refs.iteritems():

                ret[name] = store._lookup_revision_sha1(revid)

            return ret

        self.source.lock_read()

        try:

            store = BazaarObjectStore(self.source, self.mapping)

            def generate_blob_contents(have, want):

                graphwalker = SimpleFetchGraphWalker(have, store.get_parents)

                objfinder = MissingObjectFinder(store, want, graphwalker)

                return store.iter_shas(iter(objfinder.next, None))

            new_refs = self.target.send_pack(get_changed_refs, generate_blob_contents)

        finally:

            self.source.unlock()

        return revidmap, new_refs

    @staticmethod

    def is_compatible(source, target):

        """Be compatible with GitRepository."""

        return (not isinstance(source, GitRepository) and 

                isinstance(target, RemoteGitRepository))